Those vocaloid people are pretty cool. I can't seem to make them work. Tech challenged.
Hi, SpaceDog. (Interesting moniker! :))
I initially found the piano roll notation difficult to use, but after using it to edit MIDI data, it gets to be second nature. In a lot of ways, it's simpler than traditional notation, because you can just drag to change the duration.
I haven't really heard much from Vocaloids that sounds "natural", but it's an interesting way to play with melodies. It lends itself to experimentation, and trying different intervals that you might have initially considered.
But I always feel guilty about posting Vocaloid tracks, since I feel like I should be doing the singing on them. That's sort of odd, since I
don't feel guilty about not playing any of the instruments on the track.

Thanks for listening!